Gaia Data Release 4 previews

2025-12-18 Gaia DR4 data product introduction: the residual image

18 December 2025

With Gaia Data Release 4 the astrometry will be again improved upon, and an exciting new data product referred to as "residual image" will also be published. It has the potential to reveal scattered light from protoplanetary disks and other sources of diffuse light emission like the debris disk or the dusty circumstellar environments... read more

2025-10-06 Gaia's uncalibrated spectra

6 October 2025

Gaia observed the whole sky for 10.5 years according to its scanning law and has seen sources about once or twice per month on average, making Gaia particularly suited to the detection of slowly varying objects. The Gaia Photometric Science Alerts System first noticed a brightening in a faint Gaia source on 12 August 2018. It had become... read more

2024-04-16 Gaia spots Milky Way's most massive black hole of stellar origin

16 April 2024

Gaia spots Milky Way's most massive black hole of stellar origin! It's 33 solar masses, dormant, the 2nd closest to Earth at ~2000 light years away, part of a wide binary with an old giant star, with an estimated age of 11 Gyr. Find full details in our story!

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2021-02-26 Matching observations to sources for Gaia DR4

26 February 2021

While the scientific community is analysing the first batch of the Gaia DR3 data, part of the Data Processing and Analysis Consortium (DPAC) is already engaged in the production of Data Release 4. The Intermediate Data Update (IDU) pipeline and the Data Processing Centre of Barcelona delivered the results of the first cross-match run in... read more